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Lennox

OEM Lennox Water Solenoid Valve — 52P90

SKU: LNX-52P90 Brand: Lennox
$59.95 $84.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox 52P90 water solenoid valve electrically controls the flow of water to your Lennox humidifier or evaporative accessory. When the control calls for humidification, the solenoid energizes and opens the valve to feed water across the media; when the call ends, it closes to stop the flow. This on-demand operation is what lets your system add moisture precisely without wasting water.

Common failure symptoms: A failed 52P90 may stick closed — resulting in no water flow, dry humidifier media, and low indoor humidity — or stick open, causing continuous water flow, overflow, or leaks around the unit. A buzzing or humming coil, mineral-scaled internals, or a valve that no longer responds to the humidistat are all signs it needs replacement.

Why OEM matters: The Lennox 52P90 is matched to the correct coil voltage, flow rate, and port fittings for your Lennox accessory, ensuring reliable actuation and a leak-free seal. Aftermarket valves can mismatch flow or thread size and fail prematurely under scale buildup. The factory-specified valve restores dependable humidity control and protects surrounding components from water damage.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $75
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Valve fit my Lennox OEM Lennox Water Solenoid Valve — 52P90?
Yes. This is the factory-specified OEM valve for the Lennox OEM Lennox Water Solenoid Valve — 52P90. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the valve on my Lennox OEM Lennox Water Solenoid Valve — 52P90?
Requires licensed HVAC technician. Gas valve work involves gas lines that must meet local building codes. Improper installation risks dangerous gas leaks. Buy the part yourself to save 40–60% on markup, then have your technician install it.
What symptoms mean I need a new valve?
Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.
Is this valve compatible with Bryant or Payne too?
Many Lennox parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Lennox valve?
Always use OEM. Gas valves must match exact pressure ratings, port configurations, and safety certifications. Non-OEM gas valves can create safety hazards and may violate building codes.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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Mike Rivera
HVAC Parts Specialist — Online